| SATS Ltd | Island Wide | - | OM | SS | Pioneer |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| Aigle Security Pte Ltd | Island Wide | - | OE | SSO | Sengkang |
| GATES PCM Integrated Services Pte Ltd | Island Wide | - | OE | SSO | Sengkang |
| Ademco Security Pte Ltd | Island Wide | - | SSO | SSO | Toa Payoh |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Certis Group | Island Wide | - | SSO | SSS | Yishun |
| SECOM Singapore Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SS | Bedok |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Bedok |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SO | Woodlands |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SO | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | South | - | OE | SSS | Woodlands |
| Soverus Pte Ltd | Island Wide | - | SS | SS | Hougang |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSS | Queenstown |
| SATS Ltd | Island Wide | - | OM | SSS | Woodlands |
| Prosegur Singapore Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Yishun |
